It has not been invented yet a measuring system and the right equipment to measure how food or wine smells or tastes, so they're still using TDS-meters, reflectometers and stuff like that, but human subjects are a must in this area for sure.The most important measurement system for the quality of audio-equipment, food, wine, video-equipment etc. is our individual brain
Although, for video we have calibration spiders.
For audio, we do have enough good mics and REW or, why not, a good ADC and DeltaW. Not saying that measurements are always perfect and tell the entire story about an audio gear, but if there are audible differences that more human subjects can actually hear, then I'm sure this can be measured with audio equipment as well. After all, similar audio equipment was used in the recording studio, so if it was good for recording it must be good enough to record the output of a speaker and then compare the files on a PC.